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Table 1 Study design: The 16 interview formats according to baseline risk of heart attack, level of effectiveness, and initial piece of information

From: Communicating effectiveness of intervention for chronic diseases: what single format can replace comprehensive information?

   ARR RRR NNT POL
Baseline Risk Level of effectiveness Effect size n Effect size n Effect size n Effect size n
Low (5%) Low 2% 79 40% 79 50 68 4 mths 69
  High 4% 75 80% 69 25 69 8 mths 67
High (15%) Low 5% 71 33% 73 20 82 8 mths 86
  High 10% 69 66% 71 10 69 16 mths 73
Total    294   292   288   295